LED driver circuits that reduce observable optical flicker by reducing rectified ac power grid ripple using a flyback converter

A driver circuit and reverse converter technology, applied in the field of driver circuits, can solve the problem of increasing the statistical failure rate of PSU
CN104904314BInactive Publication Date: 2017-03-15艾酷瑞克有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
艾酷瑞克有限责任公司
Publication Date
2017-03-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

This application describes a driver circuit for providing drive current to an LED lighting scheme. In particular, the present invention relates to an AC input driver circuit operable in conjunction with a current regulator arrangement utilizing a plurality of Zener diodes connected in parallel combinations. The driver circuit includes a feedback mechanism operable to maintain a constant voltage across the current regulator. Embodiments of the present invention seek to address LED ripple, and thus optical flicker, caused by an LED driver connected to an AC power source at its input.
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Description

technical field

[0001] The invention relates to a driver circuit for providing driving current to an LED lighting scheme. In particular, the present invention relates to an AC input driver circuit operable in conjunction with a current regulator arrangement as described in UK Patent Application No. 1210561.5. Background technique

[0002] While continued improvements in the cost and reliability of light-emitting diodes (LEDs) have led to wider adoption of LED technology for indoor and outdoor lighting, there are still challenges in providing the drive electronics used to deliver regulated current to LED lighting systems. challenge. It is well known that variations in the drive current supplied to LED loads can adversely affect performance. In particular, LEDs from a power supply unit (PSU) receiving current from a power supply unit (PSU) that takes a single-phase alternating current (AC) input from the mains or similar source are critical to a waveform derived from a recti...

Claims

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